So I moved recently and got a new Internet Provider (AT&T) and I am unable to connect to this website through At&t. When I try to connect, I get a could not reach the website error. I tried with 2 different laptops and my phone and get the same response on all 3. I get the same result going through Wifi and Ethernet. But when I turn off the wifi on my phone and access the website just through my cellular data, it works just fine. I called AT&T and had a tech come out but after going through everything, I just get the same result. He tells me he has no idea and that he has never seen this before.

Has anybody ever had any issues like this before or know anything that I can try?

Just so you know, I am writing this on my laptop, connected through my phones mobile hotspot to write this

I have had that issue in the past from time to time...and I could have been using AT&T as well. Try clearing your history amd cookies. Maybe rebooting your laptop. Maybe giving a day or so, or trying a time of day that is not rush hour for the net.